O-LevelChemistryMetals & Reactivity5070/12 · May/June 2020 · Q251 Mark
Chlorine is passed into separate samples of aqueous potassium iodide and aqueous potassium bromide. In which solutions is there a colour change?
AKI(aq): ✓, KBr(aq): X
BKI(aq): ✓, KBr(aq): ✓
CKI(aq): X, KBr(aq): ✓
DKI(aq): X, KBr(aq): X
✓ Correct answer
A: KI(aq): ✓, KBr(aq): X
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